/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.    
 */
package dk.redillusions.jdbc.proxy;

import java.util.HashSet;
import java.util.Set;

/**
 * 
 * 
 * @author Sune Wettersteen
 * 
 */
public final class JDBCProviderRegistry {
	/**
	 * The set of providers.
	 */
	private static HashSet<JDBCProvider> registryList = new HashSet<JDBCProvider>();

	/**
	 * Constructor.
	 */
	private JDBCProviderRegistry() {
		// Does nothing
	}

	/**
	 * Register a {@link JDBCProvider}.
	 * 
	 * @param provider
	 *            The provider
	 */
	public static void registerProvider(final JDBCProvider provider) {
		registryList.add(provider);
	}

	/**
	 * 
	 * 
	 * @param provider
	 *            The provider
	 * @return Whether or not the provider was unregistered
	 */
	public static boolean unregisterProvider(final JDBCProvider provider) {
		return registryList.remove(provider);
	}

	/**
	 * Get the set of registered {@link JDBCProvider}s.
	 * 
	 * @return The set of {@link JDBCProvider}s
	 */
	@SuppressWarnings("unchecked")
	static Set<JDBCProvider> getRegistryList() {
		return (Set<JDBCProvider>) registryList.clone();
	}
}
